diff --git a/tools/sp-harness.bash b/tools/sp-harness.bash
index dec280d..33a41b3 100755
--- a/tools/sp-harness.bash
+++ b/tools/sp-harness.bash
@@ -21,4 +21,5 @@ done
 
 MAX_PARTICLES="${MAX_PARTICLES:=2000}"
 
-RUST_BACKTRACE=1 parallel "'$MODEL'" '{1}' $MAX_PARTICLES '{2}' "$ROOT/{2}/{1}.csv" ::: {1..100} ::: $PROBABILITIES
+SEEDS="${SEEDS:=$(seq 1 100)}"
+RUST_BACKTRACE=1 parallel "'$MODEL'" '{1}' $MAX_PARTICLES '{2}' "$ROOT/{2}/{1}.csv" ::: $SEEDS ::: $PROBABILITIES